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Journals

The effect of impurities on calculated activity in the triple-to-double coincidence ratio liquid scintillation method

March 4, 2012

Author(s)

Denis E. Bergeron, Ryan P. Fitzgerald, Brian E. Zimmerman, Jeffrey T. Cessna

In the triple-to-double coincidence ratio (TDCR) method of liquid scintillation counting, unaccounted or improperly accounted impurities can result in lower...

Regional, Temporal, and Species Patterns of Mercury in Alaskan Seabird Eggs: Mercury Sources and Cycling or Food Web Effects?

March 4, 2012

Author(s)

Russell D. Day, David G. Roseneau, Stacy S. Schuur, Keith A. Hobson, O.F.X Donard, Rebecca S. Pugh, Amanda J. Moors, Paul R. Becker

Mercury concentration ([Hg]), δ15N, and δ13C were measured in eggs from common murres (Uria aalge), thick-billed murres (U. lomvia), glaucous gulls (Larus...

Laboratories New to the ICRM

March 4, 2012

Author(s)

Lisa R. Karam, Marios J. Anagnostakis, Arunas Gudelis, Pujadi Marsoem, Alexander Mauring, Gatot Wurdiyanto, Ulku Yucel

The Scientific Committee of the ICRM decided, for the 2011 Conference, to present laboratories that are at a key developmental stage in establishing, expanding...

Uncertainty determination for activity measurements by means of the TDCR method and the CIEMAT/NIST efficiency tracing technique

March 4, 2012

Author(s)

K Kossert, R. Broda, P Cassette, G Ratel, Brian E. Zimmerman

Liquid scintillation (LS) counting is a very powerful technique for the activity determination of a number of radionuclides. In radionuclide metrology, the TDCR...

A Bayesian Approach to the Evaluation of Comparisons of Individually Value-Assigned Reference Materials

March 3, 2012

Author(s)

Blaza Toman

A new data analysis procedure is presented for the evaluation of comparisons of reference materials individually prepared and value-assigned by different...

Determination of micelle size in some commercial liquid scintillation cocktails

March 3, 2012

Author(s)

Denis E. Bergeron

We performed dynamic light scattering measurements on commercially available liquid scintillation (LS) cocktails over a range of aqueous and acid contents. In...

New method for spectral irradiance and radiance responsivity calibrations using kHz pulsed tunable optical parametric oscillators

March 2, 2012

Author(s)

Yuqin Zong, Steven W. Brown, George P. Eppeldauer, Keith R. Lykke, Yoshihiro Ohno

Continuous-wave (CW) tunable lasers have been used for detector calibrations, especially for spectral irradiance and radiance responsivity, for many years at...

Extension of the NIST spectral power-responsivity calibration service to 2500 nm

March 2, 2012

Author(s)

George P. Eppeldauer, Howard W. Yoon, Jinan Zeng, Thomas C. Larason, Jeanne M. Houston, Vladimir Khromchenko

The National Institute of Standards and Technology (NIST) is working to extend the upper wavelength limit of the spectral power-responsivity calibration service...

Transitory Temperatures of Organic-Film Coated Specimens under Outdoor Exposure

March 2, 2012

Author(s)

William C. Thomas, Christopher C. White, Walter E. Byrd

A mathematical model is presented and validated for predicting the temperature of thin polymeric films bonded to substrate materials. The National Institute of...

Interactions of 14C-labeled multi-walled carbo nanotubes with soil minerals in water

March 2, 2012

Author(s)

Liwen Zhang, Elijah Petersen, Wen Zhang, Yongsheng Chen, Miguel Cabrera, Qingguo Huang

One of the critical factors related to the environmental fate of carbon nanotubes (CNTs) is their phase distribution between soil or sediment and water. To...

Quantum Cascade Laser-Based Measurement of Metal Alkylamide Density During Atomic Layer Deposition

March 1, 2012

Author(s)

James E. Maslar, William A. Kimes, Brent A. Sperling

An in situ gas-phase diagnostic for the metal alkylamide compound tetrakis(ethylmethylamino) hafnium (TEMAH), Hf[N(C2H5)(CH3)]4, was demonstrated. This...

Transmission EBSD from 10 nm domains in a scanning electron microscope

March 1, 2012

Author(s)

Robert R. Keller, Roy H. Geiss

The spatial resolution of electron diffraction within the scanning electron microscope (SEM) has progressed from channelling methods capable of measuring...

CODATA Recommended Values of the Fundamental Physical Constants: 2010

March 1, 2012

Author(s)

Peter J. Mohr, Barry N. Taylor, David B. Newell

This paper give the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on...

Differential matrices for depolarizing media

March 1, 2012

Author(s)

Thomas A. Germer

The evolution of a Stokes vector through depolarizing media is considered. A general form for the differential matrix is derived that is appropriate in the...

Freeform Fabricated Scaffolds with Roughened Struts that Enhance both Stem Cell Proliferation and Differentiation by Controlling Cell Shape

March 1, 2012

Author(s)

Girish Kumar, Carl G. Simon Jr., Michael S. Waters, Tanya M. Farooque, Marian F. Young

We demonstrate that imparting freeform fabricated (FFF) scaffolds with surface roughness on their struts enhances osteogenic differentiation of primary human...

Catalyst-free GaN Nanowires as Nanoscale Light Emitters

March 1, 2012

Author(s)

Kristine A. Bertness, Norman A. Sanford, John B. Schlager, Alexana Roshko, Todd E. Harvey, Paul T. Blanchard, Matthew D. Brubaker, Andrew M. Herrero, Aric W. Sanders

Catalyst-free growth of GaN nanowires with molecular beam epitaxy produces material of exceptionally high quality with long minority carrier lifetimes and low...

An absolute cavity pyrgeometer to measure the absolute outdoor longwave irradiance with traceability to International System of Units, SI

March 1, 2012

Author(s)

Ibrahim Reda, Jinan Zeng, Jonathan Scheuch, Leonard Hanssen, Daryl Myers, Boris Wilthan, Tom Stoffel

This article describes a method of measuring the absolute outdoor longwave irradiance using an absolute cavity pyrgeometer (ACP). The ACP consists ofa domeless...

Stress propagation in a colloidal suspension under shear

March 1, 2012

Author(s)

William L. George, Pascal Hebraud, Didier Lootens, Mouhamad Khalil, Nicos Martys

The stress propagation in a concentrated attractive colloidal suspension, under shear, is studied using mumerical simulations. A novel way of describing the...

Light a Single Candle: Studying Supernovae

March 1, 2012

Author(s)

Dianne M. O'Leary, Bert W. Rust

At peak luminosity, Type Ia supernovae can be even brighter than their parent galaxies, and their light curves display a very uniform and regular behavior. This...

Hydration Water Freezing in Single Supported Lipid Bilayers

March 1, 2012

Author(s)

Laura Toppozini, Clare L. Armstrong, Martin D. Kaye, Madhu Sudan Tyagi, Timothy Jenkins, Maikel C. Rheinstadter

We present a high temperature and high energy resolution neturon scattering investigation of hydration water freezing in single supported lipid bilayers. Single...

X-ray and Neutron Reflectivity and Electronic Properties of PCBM-poly(bromo)styrene Blends and Bilayers with Poly(3-hexylthiophene)

March 1, 2012

Author(s)

Stuart B. Kirschner, Nathaniel P. Smith, Kevin A. Wepasnick, Howard E. Katz, Brian Kirby, Julie Borchers, Daniel H. Reich

We used neutron reflectivity to complement x-ray reflectivity characterization of PCMB-based layers formed on poly(3-hexylthiophene) (P3HT). Single-layer...

RbFe²⁺Fe³⁺F₆: Synthesis, Structure, and Characterization of a New Charge-Ordered Magnetically Frustrated Pyrochlore-Related Mixed-Metal Fluoride

March 1, 2012

Author(s)

Sun Woo Kim, Sang-Hwan Kim, P. Shiv Halasyamani, Mark Green, Kanwal Preet Bhatti, Chris Leighton, Hena Das, Craig J. Fennie

Fitting EXAFS data using molecular dynamics outputs and a histogram approach

February 29, 2012

Author(s)

Bruce Ravel, Stephen W. Price, Nicholas Zonias, Chris-Kriton Skylaris, Andrea Russell

It has been shown that for highly disordered systems, EXAFS underestimates coordination number and thus particle size when compared with the theoretical...

The 2009 Materials Science &Technology Conference & Exhibition (MS&T09)

February 29, 2012

Author(s)

Winnie Wong-Ng

The 2009 Materials Science and Technology Conference and Exhibition (MS&T09) took place at the David L. Lawrence Convention Center in Pittsburgh , Pennsylvania...

Equation of state for benzene for temperatures from the melting line up to 725 K with pressures up to 500 MPa

February 29, 2012

Author(s)

Monika Thol, Eric Lemmon, Roland Span

An equation of state (EOS) is presented for the thermodynamic properties of benzene that is valid from the triple point temperature (278.6784 K) to 725 K with...

High Accuracy Measurements of OH Reaction Rate Constants and IR Absorption Spectra: Substituted 2-Propanols

February 28, 2012

Author(s)

Vladimir L. Orkin, Victor Khamaganov, Michael J. Kurylo III

Rate constants for the gas phase reactions of OH radicals with 2-propanol and three fluorine substituted 2-Propanols, (CH3)2CHOH (k0), CF3)2COH (k1), (CF3)2C(OH...

Determination of Low-Level Sulfur Concentrations by Isotope Dilution Multi-Collector Inductively Couple Plasma Mass Spectrometry (D-MC-ICPMS) Using 33S Spike and Internal Normalization for Mass Bias Correction

February 28, 2012

Author(s)

Jacqueline L. Mann, Robert D. Vocke Jr., William R. Kelly

An isotope dilution (ID) multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) method combined with an internal normalization approach for...

State-of-the-Art Comparability of Corrected Emission Spectra-Part II: Peer-toPeer Assessment of Calibration Performance Using Spectral Fluorescence Standards

February 28, 2012

Author(s)

Paul C. DeRose, Joanne C. Zwinkels, Bernd Ebert

The tremendous growth of fluorescence applications in the life and material sciences has proceeded largely without sufficient concern for the reliability and...

Ultra-small-Angle X-ray Scattering - X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites

February 28, 2012

Author(s)

Fan Zhang, Andrew Allen, Lyle E. Levine, Laura Espinal, Joseph M. Antonucci, Drago Skrtic, Justin N. O'Donnell, Jan Ilavsky

The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement...

Volatility of Mixtures of JP-8 with Biomass Derived Hydroprocessed Renewable Jet Fuels by the Composition Explicit Distillation Curve Method

February 28, 2012

Author(s)

Jean Van Buren, Kathryn Abel, Tara Lovestead, Thomas J. Bruno

In recent years, civilian and military users of aviation kerosene have been interested in expanding the scope of fuel feed stocks to include non-petroleum...

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